.circle{
    height: 100px;
    width: 100px;
    border-radius: 50%;
    background-color: #55b04c;
    color: white;
    line-height: 100px;
    text-align: center;
    opacity: 0.5; /* 设置半透明效果 */  
}
.rect{
  height: 50px;
  width: 100px;
  background-color: #55b04c;
  color: white;
  line-height: 50px;
  text-align: center;
}